function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dvorak, Libor & Fogasova, Katarina & Obona, Jozef', 3],
    ['Hancock, E. Geoffrey & Marcos-Garcia, M-Angeles', 1],
    ['Kang, Zehui & Gao, Gang & Zhang, Xiao & Yang, Ding', 3],
    ['Kang, Zehui & Xue, Zhaoxiang & Zhang, Xiao', 6],
    ['Kang, Zehui & Yao, Gang & Yang, Ding', 6],
    ['Keresztes, Lujza & Kappert, Juergen & Henning, Maria', 2],
    ['Krzeminski, Wieslaw & Prokop, Jakub', 2],
    ['Meigen, Johann Wilhelm', 1],
    ['Shao, Jiaqi & Kang, Zehui', 4],
    ['Wiberg-Larsen, Peter & Hansen, Søren Birkholm & Rinne, Aki', 8],
    ['Zhang, Xiao & Kang, Zehui', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);